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1980年第二季度,美国通用动力公司(GM)电气动力部(EMD)开始生产 GP-50型电力传动内燃机车。该型机车具有很多新的特点:1)装有一台功率为3800马力(有效功率为3500马力)的16—645F 新型柴油机,而早先的16—645E 型柴油机的功率仅为3300马力(有效功率为3000马力);2)装有新型的其持续电流达1170安的 D87牵引电动机,而原先的 D77型牵引电动机的持续电流仅为1050安;3)为控制轮对蠕滑,首次应用了“超级蠕滑控制系统”。较之普通的轮对蠕滑控制系统,该系统可使机车粘着系数达到33%,新型的 GP-50机车为四轴,在许多使用场合,可用之取代六轴机车。
In the second quarter of 1980, the General Electric Company (GM) Department of Electrical and Mechanical Services (EMD) began producing GP-50 electric drive diesel locomotives. The locomotive has many new features: 1) A new 16-645F diesel engine with 3800 horsepower (3500 hp) is available, compared with the earlier version of the 16-645E diesel with 3300 hp (effective power 3000 horsepower); 2) equipped with a new D87 traction motor with a continuous current of 1170 amps, while the original D77 traction motor has a continuous current of only 1050 amps; 3) for the first time, Creep control system. " The system achieves a 33% locomotive adhesion coefficient compared to conventional wheelset creep control systems. The new GP-50 locomotive is four-axis and replaces six-axle locomotives in many applications.